ASoC: wm5110: Correct input OSR bits for wm5110

The input OSR bits are specified differently for wm5110 than for current
revs of wm5102. This patch corrects support for this on wm5110.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@linaro.org>